Most of the major science suppliers carry glass 38-mm and 50-mm diameter
lenses (biconvex and biconcave).

tap-l@listproc.appstate.edu writes:
>Good Morning Tappers;
>
>Where is a good place to get 38 mm diameter lenses used in labs. I need
>to replenish my stock.
>
>Also, how much Poly Carbonate goes with how much water in the overturned
>bucket?
>
>
>Thanks
>
>Duane Warn
>Boise State U.
>
>